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  2. List of pearls by size - Wikipedia

    en.wikipedia.org/wiki/List_of_pearls_by_size

    The Pearl of Lao Tzu for a long time thought to be the largest pearl, but claims about its size and much of its history were found to be fabricated by a conman by the name of Victor Barbish. [2] Other pearls like the Centaur Pearl, most likely the largest gem pearl at 856.58 carats (171.316 g), have just recently emerged from private collections.

  3. Cultured freshwater pearls - Wikipedia

    en.wikipedia.org/wiki/Cultured_freshwater_pearls

    Freshwater pearl harvests are typically bought while still in the shell. After harvest the pearls are delivered to a first-stage factory, which is responsible for cleaning and sorting the pearls by size and shape. After this process has been completed, the pearls are considered ready material for processing factories.

  4. Unionida - Wikipedia

    en.wikipedia.org/wiki/Unionida

    Cultured pearls have a similar color to natural pearls as the nacre is laid down by the mantle of the freshwater mussel, and thus the color of the pearl may be species specific. Exportation of freshwater mussels for the use in the Japanese cultured pearl industry has supported the North American freshwater mussel fisheries since the late 1950s.

  5. Pearl - Wikipedia

    en.wikipedia.org/wiki/Pearl

    The original Japanese cultured pearls, known as akoya pearls, are produced by a species of small pearl oyster, Pinctada fucata martensii, which is no bigger than 6 to 8 cm (2.4 to 3.1 in) in size, hence akoya pearls larger than 10 mm in diameter are extremely rare and highly priced. Today, a hybrid mollusk is used in both Japan and China in the ...

  6. Cyrtonaias tampicoensis - Wikipedia

    en.wikipedia.org/wiki/Cyrtonaias_tampicoensis

    The Concho pearl is a coveted and rare occurring natural pearl, harvested from C. tampicoensis. These naturally forming pearls occur in 3-4% of C. tampicoensis, which is roughly 1 out of every 500–1,000 possessing a pearl. [5] This pearl craze can be traced back to the early Spanish present-day Texas and Mexico in the mid-17th century. [5]

  7. Cultured pearl - Wikipedia

    en.wikipedia.org/wiki/Cultured_pearl

    The cultured pearls on the market today can be divided into two categories. The first category covers the beaded cultured pearls, including Akoya, South Sea, Tahiti, and the large, modern freshwater pearl, the Edison pearl. These pearls are gonad-grown, and usually one pearl is grown at a time. This limits the number of pearls at a harvest period.

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